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(No Model.)

A. WORTHINGTON.

BOILER.

No. 377,001. Patented Jan. 24 1888.

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V UNITED STATES PATENT Orrlcnr 1 i AMASA woR rHINeToN, OF BROOKLYN, NEW YORK, ASSIGNOR fro THE ABENDROTH & oo'r MANUFACTURING COMPANY, on NEW YORK. j

i BOILER.

SPECIFICATION, forming part of Letters Patent No. 377,001, dated January 24, less. i

' Application filed October 19, 1886. Serial Ida/216,061. (No model.) I i To all whom, it may concern:'

Be it known that I, AMASA WORTHINGTON, a citizen of the United States, residing at Brooklyn, in the county ofIKings and State of New York, have invented certain new and useful Improvements in Boilers, of which the following is a fullfclear, and exact description.

My invention relates to an improvement in water-tube boilers,and particularly in the connection between the water-tubes and the muddrum; and the object of my invention is to provide a means'for connecting thelowerinost series of water-tubes with the rear of the muddrum below its center,which shall at the same time present no obstruction to the ready upward flowof water.

The character of boilerto which the invention more particularly relates is'fully described. in an application for Letters Patentfiled by me of even date herewith-Serial No. 216,060, and consists of a series of water'tubes supported in an inclined position, the tubes being connected together in vertical horizontal series by means ofheaders and bends. In boilers of this class it is found preferable to providethe intrddrum at the rear or lower end of the water-tubesfivhence the water flows upward through the series of tubes to the steam-drum. It is found important to preserve the sizeand shape ofthe mud-drum and maintain it below the center ofgravity of the boiler-tubes; but this is not ordinarily possible with the character of connection in 00111- mon use,necessitating, as it does, a reduction in the area of the drum and its local displacement, or a change in its cylindrical contour,

and a bore of uniform diameter, and communicating with the mud-drum below its center;

and my invention further consists in the de tails, as hereinafter set forth.

In the drawings, Figure 1 represents a rear 7 elevation of the mud-drum and lower part of a steam-boiler made in accordance with my invention; Fig. 2, an enlarged view showing a detail; Fig. 3, a crosssection through [the drum and one of the bends or connections,

and Fig. 4', a section of the same on the line zvx,Fig.3.

A is the furnace-wall, B the mud drum, O the boiler-tubes,D the headers, and E the bends for connecting the water-tubes together,

all constructed as described in my said other i d 7 application.-

F is the bend or connection between the lowermost series of water-tubes and'the muddrum, of which in a boiler of the size ilhistratedfour will be provided, it bein'gnoted that each bend provides a connection for a pair of tubes with the drum, and through the section'of tubes. The upper end of the bend tends with slight divergence from if straight line for a large part of its extent, and then changes its direction sharply, maintaining,

headers and bends with one entire vertical:

F is chamfered, as shown,and enters the aper- Y however, a uniform diameterthroughout. By I thisconstruction I am able to-provide aconneotion between the lower ends of the water-i,

tubes and the rear and lower partof the mud- I drum without interposing any obstacleto the 'f ree'fiow of, the water. a V

The connection between the bend and 'muddrum is effectedas follows: A part of the 0y, i?

the wall of the drum at the flattenedpardand a 'square' groove, R, is provided in the wallof "lindrical surface of the mud-drum is flattened; andanaperturc of sufficient size formedpin,

thedrum contiguous to saidaperture', for the 7 reception of asoft-metalwasher' of thekind described in my said other application,Serial No. 216,060, said washer, however, forming no part of the invention claimed in this application.

i, The wall of the cylindrical part ofthe muddrum contiguous to theaperture is recessed at L to receive the head of a T-bolt, the shankpassing through the recess K, also formed in the wall of the drum. The lower outlet of the bend F is ehamfered,and the bendis provided on its exterior with perforated ears 0. To connect the bend and mud-drum,the head and part of the shank of T-bolts P are insertedin 2. In combination, the mud-drum B, having apertures Q and recesses K below its center, water-tube header G, bend F, having a long and a short arm and a bore of uniform diameter throughout, charn fered at its opposite :0 ends and provided with perforated ears 0, and T-bolts P and nuts, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand this 7th day of October, A. D. 1886.

AMASA VVORTHINGTON.

Witnesses:

THORNE S. \VALLING, DOUGLAS DYRENFORTH. 

